Adjustable clamp



' June 24; 1930. A. DISIBIO ADJUSTABLE CLAMP Filed Dec. 1, 1928 Fir)": 1b 7 15 ATTORNEY Patented :Iune 24 1930 ANGELO DISIBIO} or .PITrsBcRe, cALIFOImIAY ADJUSTABLE, crime 7 Application filediDecember 1, Serial Ito. 323,090.

.This invention relates to improvements in' clamps for use by carpenters and other workmen and particularly representsv improvements over the structure shown in my Patent No.

. The principal objecti of the present invention is to provide a clamping structure of this general character having. an im- 10 proved mechanism for enabling the slidable clamping block to be manipulated with greater ease than was previously the'case.

A further object vis to provide a structure of this nature which may either be used as a portable hand implement or rigidly associated'with a workvtable or bench as may be desired. I

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the signed. 1 I

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specifications and claims. i

In the drawings similar characters of reference indicate corr sponding parts in the several views: I r v Fig. 1 is a perspective view of-the clamp as built to be a portable unit only.-

Fig. 2 is a similar view of a clamp structure of a type adapted to be either used as a portable unit, or to be rigidly secured to a bench, showing the same as thus secured.

Fig. 3 is a side elevation of aform'of the clamp structure particularly intended to be made in large sizes for use in connection with loads of lumber being. carried on trucks 40 and the like.

. Fig. 4c is an enlarged cross section on the line l4 of Fig. 2.

Fig. 5 is a longitudinal section on the line 5-5 of Fig. 4:.

Referring now more particularly to the characters of reference on the drawings the clamping structure in all its forms includes essentially a rigid bar, shown-.inthe three types of Figures 1, 2,' and 3, as 1, l and 1 respectively. 'All the bars "are provided 1,689,331 dated October 30th,,

purpose for which it is de disassociated from thebench and clamping screw by means of with a rowof teeth 2 along their upper face, which teeth are preferably of substantially square form. The-bar l is provided, on one endwith a rigid upstanding pad 3,' While on the bars 1" and 1 slidable blocks. -l"and t resp'ectively take the place of said 'pad. Slidable on the bar I'is a block 5 hav ing an adjustment screw 6 mounted therein 7 parallel to the bar and provided on one end with a pad 7 to face the fixed pad 3. Means is provided between the blockjand bar to hold theblock'at any'position along the bar, but since such means is identical with that provided on the structure of Figure '2-,' which will be described later, it is 'not thought necessaryto describe such means for. the specific stru'cture'sho'wn in Fig.1. Slidable on thebar 1" of the second type illustrated is a block 8, corresponding to the block 5fbut cut away on' one side of the bar, While being fittedonto the bar in such a manner that said block cannot be diszontal studs 11 projecting through holes provided transversely through. the bar 1 Nutsf12 on the outer ends ofthe studs engage said bar and cinch the same against the yokes. The slide blocks being cut awayon the side of the bar nearest the yokes, said blocks are enabled to be' shifted past the yokes in either' direction without interference. At the same time the bar is easily' yokes so as to beused as a portable tool if desired. 7

An adjustment screw 13is mounted in the block 8 parallel to" the bar 1, which onits end 'facing'the block 4 turnably engages a rectangular pad 14 of 'substantially'thesame area as the face of said block above the bar;

'Thispad is supported and guided in its movement" independent of the adjustment pins 15 secured. on the 4 20.; "seen that when one finger is engaged with back face of the the block 8.

pad and slidable through Mounted in said block 8 for slidingrrnove- V ment therein at right angles to, the teeth 2 and adapted to project betweenv any two of I fiired finger ring QO mounted in connection 'with'said plate between the lever and barand disposed ina vertical plane. o By'meansof, this arrangement itwill be the ring and the thumb isused to manipulate the lever the block may be readily shifted in either direction as" desired, so as to move the 25. 1.

same close to the part being engaged before manipulating the screw 13. "It Will also be seen that owing tojthe particular positioning ofthe. outer end of thelever and the ring,

these parts are in a very convenient position to be engaged by thejproperdigits of the hand so that not only may the lever be very easily depressed but, shifting movement of.

the block, as said lever is held depressed, is

rendered a very simple and easy procedure. 2 This same pawl and operating arrangement is 'mounted inbonnectioii withthe Fig.1, as well lasthe bar lfimay beprovided. Q

blocks 5 and 4, aswell as 'with the opposed blocks 4* and 4 on the bar l The latter bar and theslidable members thereon are of greater length and height respectively than in the other types, and are made of correspondingly greater proportions throughout,

being particularly intended to straddle a load of lumber on a truck or the like, so as to keep such load from displacement while beingltransported. s

The blocks, or rather. arms, 4* and 4 are also provided on their outer sides with rope engaging cleats and eyes as indicated at'21. ,IThe bar of the type of device shown in with the spaced holes for the reception of the clamp-studs, so. that this type may also be mounted in a rigid manner if desired;

-. ,Fromthe foregoing description it'will be readilyseen that I have produced such a device as substantially fulfills the objects of the invention as set forth' herein. V

' While this specification sets forth in detail. the present and preferred construction of'the'device, still in: practice such deviations from such detail may be resorted toas do not form a'departure from the spirit of the invention, as defined bythe appended'claims. V;Hav1ng thus described my invention what I claim as new and useful and desi'reto secure by Letters Patent is:

' 1. A clamp including a bar having ratchet teeth along'one face thereof, a. block slidable along the bar, a pawl mountedin the black at an angle to the toothed'face thereof and normally engaging one of the teeth, means for releasing the pawl fromthe teeth. comprising a depressible finger-lever pivoted in connection with and projecting at oneend into the block to permanently engage the pawl and a rigid finger-ring fixed in connection with the block on the same end as that from which thelever projects and'disposed between said lever and the bearing.

2. Av clamp includinga rigid ,bar, a block slidably'mounted thereon, clamping elements for. detachable engagement with a'bencli, studs pro ectingfrom said elements to extend through one side face ofthe bar; the

block being cutaway from surrounding relartionship with the bar on "the corresponding side, to. permit of sliding movement of the block past thestuds and clamping elements. In testimony whereof I afiiX my signature.

v ANGELO DISIBIO. 

